AS Level Biology A H020/01 Breadth in biology Sample Question Paper

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1 Young mammals receive antibodies in their mother’s milk. This is an example of which type of immunity? A artificial active immunity B artificial passive immunity C natural active immunity D n... atural passive immunity Your answer [1] 2 Which of the following descriptions is correct? A Vaccination gives long-term protection, immunisation gives short-term protection. B Vaccination involves injection of antigenic material and immunisation is the process of developing immunity. C Vaccination involves injection of antigenic material, immunisation is injection of antibodies. D Vaccination and immunisation have the same meaning. Your answer [1] 3 When you listen to a human heartbeat through a stethoscope you can hear a two stage ‘lub–dub’ sound. Which of the following causes the first ‘lub’ component? A closing of the atrioventricular valves B sound of blood rushing into the atria C sound of blood rushing into the ventricles D closing of semilunar valves Your answer [1] SPECIMEN 3 © OCR 2016 H020/01 Turn over 4 Zinc ions are necessary for the enzyme carbonic anhydrase to work. Which statement correctly describes the nature and function of zinc ions in their interaction with carbonic anhydrase? A inorganic ions and coenzymes B vitamins and prosthetic groups C inorganic ions and prosthetic groups D vitamins and coenzymes Your answer [1] 5 Using the light micrograph below and the formula 3 3 4 r what is the volume of a neutrophil? A 2 µm3 B 20 µm3 C 200 µm3 D 2000 µm3 Your answer [1] SPECIMEN 4 © OCR 2016 H020/01 6 Three types of microscope are listed below. Select the row that shows the correct use for each type of microscope. Type of microscope and what it is used to observe Light microscope Transmission electron microscope Laser scanning confocal microscope A an object at a certain depth within a cell cell surfaces organelles B an object at a certain depth within a cell cell surfaces whole cells and tissues C whole cells and tissues organelles cell surfaces D whole cells and tissues organelles an object at a certain depth within a cell Your answer [1] 7 Cyanobacteria are photoautotrophs and fossil records confirm their existence 3.5 billion years ago. Which row describes the structure of cyanobacteria? Feature Nucleus Circular DNA Mitochondria Ribosomes Chloroplast Cell wall A    B    C    D    Your answer [1] 8 Fig. 8.1 shows an animal cell. SPECIMEN 5 © OCR 2016 H020/01 Turn over Fig. 8.1 Which option describes the correct sequence of organelles involved during the production and secretion of a protein from this cell? A S, K, L, J B T, K, L, J C T, M, L, J D S, T, K, L Your answer [1] SPECIMEN 6 © OCR 2016 H020/01 [Show More]

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